I have a 20 gallon tank I've had for about ten years. And my mom had I for 8 before that. Now I have three others and debated getting rid of it, but I'm sentimental as it was my first tank on my own. The only thing that's really changed is that I upgraded the filter to a Tetra Whisper 40. But the rocks are a weird mix of natural and every color you can imagine. The plastic and silk plants are like falling apart. And I think it has old tank syndrome of nothing really lives in it long no matter how good the water is. So I plan to strip it. New gravel (though I'm tempted to dabble in sand, which I've never done), replace the plastic with live and just change everything. So should I keep the old filter media or completely start new? If letting it re-cycle is the best thing to do, I'll do it. On top of that I don't know what to put in it once it's resettled. I've always wanted a freshwater puffer or an axolotl. But I'm also debating another betta tank, either a male or maybe two or three girls? Or maybe like one 'big' fish with lots of personality. So I'm looking for ideas. I do have a local shop in my area that has already told me they will happily order me whatever I decide. Looking for any advice and if anyone wants to see its current state, I'll post a picture when I get home. Along with my two established and my one tank that's a work in progress.